Caption: DNA research. X-ray crystallography diffraction pattern obtained in research to determine the structure of DNA (deoxyribonucleic acid). This sample of DNA was obtained from a mouse. This image was produced by British physicist and molecular biologist Maurice Wilkins (1916-2004) while working at the MRC Biophysics Research Unit at King's College London, UK. It was here in the early 1950s that Wilkins and Rosalind Franklin obtained X-ray diffraction patterns for DNA that led to James Watson and Francis Crick constructing the DNA double helix model. This led to the award of the 1962 Nobel Prize in Physiology or Medicine to Crick, Watson and Wilkins.